Liquid-treating apparatus.



K. W. BARTLETT. LIQUID TREATING APPARATUS.

APPLICATION TILED-JUNE 27. 1910.

Patented Dec.12,1911

COLUMBIA PLANOGRAPH 00.,WASH1NGTON. n. C

KENT W. BARTLETT, OF CHICAGO, ILLINOIS.

LIQUID-TREATING APPARATUS.

Specification of Letters Patent.

Patented Dec. 12, 1911.

7 Application filed June 27, 1910. Serial No. 568,983.

To all whom it may concern:

Be it known that I, KENT W. BARTLETT, citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Liquid-TreatingApparatus, of which the following is a full,

clear, concise, and exact description, refer ence being had to theaccompanying drawings, forming a part of this specification.

M y invention relates to apparatus for preparing chemicals in liquidform and is of particular service in connection with liquid treating orwater softening apparatus.

I will explain my invention by reference to the accompanying drawingshowing the .preferred embodiment thereof as employed in connect-ionwith water softening apparatus, the drawing illustrating a settlingtank, a chemical reservoir upon the top of the tank for supplyingchemical to the tank, and chemical mixing apparatus at the bottom of thetank.

The settling tank a may be of any well known or suitable form and servesas asupport for a chemical supply tank 6 in which the chemical isreceived through a pipe 0, after said chemical has been suitablyprepared, and from which it is discharged into the settling tank througha pipe 03 that is in communi cation with an overflow opening e in thechemical tank. Suitable agitating mechanism f, forming one part of mypresent invention, is contained Within the chemical tank for keeping thechemical solution uniformly mixed. In the apparatus illustrated,chemical is admitted to the settling tank as the treated liquid in thesettling tank is withdrawn, the chemical being fed from the chemicaltank to the settling tank by being displaced from the chemical tank bywater flowing through the pipe 9 at a rate which increases as thestrengthof the chemical decreases, thereby to increase the volume ofchemical flowing into the settling tank to compensate for the diminutionin the strength of said chemical. I, however,do not limit myself to themethod in which the prepared chemical is supplied to the settling tank,as my present invention relates tothe preparation of the chemical ratherthan to its distribution after preparation.

The Water flows through the pipe 9 in increasing proportion to the waterthat is to be treated which flows through the pipe g into the settlingtank. The prepared chemical is supplied to the chemical tank through theriser or pipe 0 by means of a pump it that transfers the preparedchemical from a preparing tank ithrough a pipe is, communicating withthe interior of said preparing tank, to therise'r c. A valve, such asthe valve Z, is adapted to prevent the return of v the chemical from thechemical tank through the pipe 0. When the chemical in the chemical tankhas become weakened to its mini mum limit, it is withdrawn in sufficientquantity therefrom and is admitted to the preparing tank, preferablythrough the same pipe 0 that conveys the prepared chemical to thechemical tank, and in order that the weakened chemical may thus besupplied to the preparing tank, the Valve Z is adjusted so as tothrowthe portion of the pipe 0- above it into connection with a pipe mthat discharges into the preparing tank 2'.

In order that chemical within the chemical tank 6 may be available forpassage into the preparing tank, the pipe or duct through which thechemical is conveyed into the preparing tank communicates with thechemical tank below its upper limiting level. When an amount of'chemicalfrom the chemical tank Z) suited to the amount of dry chemical directlyplaced in the preparing tank 6 has been admitted to said preparing tank,then the valve Z is turned so as to stop the flow of chemical from thechemical tank toward the preparing tank, whereafter the material Withinthe preparing tank is intermixed, as by means of agitation manuallyefiect-ed. I have specified the admission of weakened chemical solutionfromthe chemical tank to the preparing tank as a step in the preparationof a new supply of chemical, but I do not wish to be limited to the useof weakened chemical. After the mixture has been prepared in thepreparing tank, the valves Z and a should have an adjustment whereby thepipe 0 is thrown into communication with the interior of the preparingtank by way of the pump 72, and the pipe 70, said pump then beingoperated in order to force the prepared chemical from the preparing tankinto the chemical tank, this chemical being supplied to the chemicaltank 6, in the embodiment of the invention illustrated, until it reachesits upper limiting level. In the embodiment of the inventionillustrated, one important advantage is that the amountof liquidsupplied from the chemical tank I) to the preparing tank a issubstantially the amount of liquid that is returned to the chemical tankfrom the preparing tank, the

very slight excess in volumeof the returned liquid, which excess is dueto the solid chemical, being so small as to be negligible.

In accordance with another feature of my invention, I do not withdrawall of the chemical from the preparing tank but permit a residue toremain which maybe used, for example, in slaking lime, and when thisfeature of my invention is included in the apparatus, the intake end ofthe pipe 76 is located a distance above the bottom of the preparing tankthat will permit of the retention of the desired residue of preparedchemical. A pipe 0 communicates with the interior of the preparing tankvery close to its bottom and may be thrown into communication with aslaking chamber p by means of a suitable adjustment of the valves Z andn, the pump it then being employed to transfer as much of the residue asdesired to the slaking chamber 1), this desired proportion of theresidue of the prepared chemical flowing through the pipe 0, the valven, the pump h, the valve Z, and the pipe m, the slaking chamber 7) beinginterposed between the pipe at and the tank 2'. In order that a residueof the chemical may be retained in the slaking chamber 79, I cause thepipe 9 that affords the passage between the slaking chamber and thepreparing chamber to project a suitable distance above the bottom of theslaking chamber, though I do not wish to be limited in all embodimentsof my invention to the projection of the pipe 9 toward the bottom of theslaking chamber. During the slaking operation, communication between theslaking chamber and the preparing chamber is cut off by means of a valve7*. After the slaking operation has been completed, the valve r isopened so that the slaked or hydrated chemical may be admitted to thepreparing tank 7', whereafter the desired amount of chemical is admittedto the preparing tank from the chemical tank I) in the manner and forthe purpose which has been described. In order to prevent the passage oflarger particles of dry chemical from the slaking chamber, a screen 8may be employed.

While I have herein shown and particularly described the preferredembodiment of my invention, I do not wish to be limited to the precisedetails of construction shown, as changes may readily be made withoutdeparting from the spirit'of the invention, but,

Having thus described my invention, I claim as new and desire to secureby Letters Patent the following 1. Apparatus for treating liquid,including a chemical tank from which chemical is to be supplied for thetreatment of liquid; a chemical preparing tank; a slaking cham bercommunicating with the interior of said preparing tank in order thatchemical may pass from the slaking chamber to said preparing tank; andmeans for conveying chemical from the preparing tank to the chemicaltank and to the slaking chamber.

2. Apparatus for preparing chemical, including 'a tank; a slakingchamber communicat-ing with the interior of said tank in order that thechemical may pass from the slaking chamber to said tank, the orificethrough which the chemical is discharged from the slaking chamber tosaid tank being located above the level of the bottom of the slakingchamber; and means for passing ohemicalfrom the tank to the slakingchamber.

3. Apparatus for preparing chemical, including a tank; a slaking chambercommunicating with the interior of said tank in order that the chemicalmay pass from the slaking chamber to said tank, the orifice throughwhich the chemical is discharged from the slaking chamber to said tankbeing located above the level of the bottom of the slaking chamber;means for passing chemical from the tank to the slaking chamber; and avalve structure for preventing and permitting communication between theslaking chamber and tank.

4. Apparatus of the class described, including achemical tank 6; apreparing tank 2'; a slaking chamber 19; a pipe 0 affordingcommunication between said tanks; a pipe m affording communicationbetween said pipe 0 and the slaking chamber; and a valve Z for cuttingofi' direct communication be tween said tanks and bringing about directcommunication between the pipe m and the chemical tank.

5. Apparatus of the class described, including a chemical tank I); apreparing tank 2', a slaking chamber 7), a pipe 0 aflordingcommunication between said tanks; a pipe m affording communicationbetween said pipe 0 and the slaking chamber; a valve Z for cutting offdirect communication between said tanks and bringing about directcommunication between the pipe m and the chemical tank; and means foreffecting the passage of chemical from the preparing tank to thechemical tank.

In witness whereof, I hereunto subscribe my name this 24th day of June,A. D., 1910.

KENT IV. BARTLETT.

Witnesses G. L. CRAcc, R. E. ATI-IERTON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

